Electrical, rheological and morphological studies in co-continuous blends of polyamide 6 and acrylonitrile-butadiene-styrene with multiwall carbon nanotubes prepared by melt blending

被引:171
作者
Bose, Suryasarathi [1 ]
Bhattacharyya, Arup R. [1 ]
Kulkarni, Ajit R. [1 ]
Poetschke, Petra [2 ]
机构
[1] Indian Inst Technol, Dept Met Engn & Mat Sci, Bombay 400076, Maharashtra, India
[2] Leibniz Inst Polymer Res Dresden, Dept Polymer React & Blends, D-01069 Dresden, Germany
关键词
Carbon nanotubes; Nanocomposites; Electrical properties; Rheology; Injection moulding; IMMISCIBLE POLYMER BLENDS; EPOXY-RESIN; CONDUCTIVITY; PERCOLATION; BLACK; FUNCTIONALIZATION; NANOCOMPOSITES; PARTICLES;
D O I
10.1016/j.compscitech.2008.10.024
中图分类号
TB33 [复合材料];
学科分类号
摘要
Multiwall carbon nanotubes (MWNT) were incorporated in melt-mixed co-continuous blends of polyamide 6 (PA6) and acrylonitrile-butadiene-styrene (ABS) using a conical twin-screw microcompounder. The state of dispersion of MWNT in the blends was assessed through AC electrical conductivity measurements and melt-rheological investigations. The electrical and rheological percolation threshold in PA6/ABS blends was similar to 3-4 and similar to 1-2 wt% MWNT, respectively. A unique reactive modifier (sodium salt of 6-amino hexanoic acid, Na-AHA) was employed to facilitate 'network-like' structure of MWNT and to confine them in a specific phase. This was achieved by establishing specific interactions with the delocalized 'pi-electron' clouds of MWNT and melt-interfacial reaction during melt-mixing. The electrical percolation threshold was significantly reduced in the blends (similar to 0.25 wt%) in the presence of Na-AHA modified MWNT and even coincided with the rheological percolation threshold. Significant refinement in the co-continuous structure was also observed in the presence of Na-AHA modified MWNT. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:365 / 372
页数:8
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